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curriculum/challenges/english/blocks/learn-list-comprehension-by-building-a-case-converter-program/663b10c10a4c0a0e095137ee.md

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--description--

Instead of returning the list snake_cased_char_list, you will need to join its elements into a single string using an empty string '' as the separator.

Modify the return statement to return the result of joining snake_cased_char_list with an empty string as a separator.

--hints--

You should modify the return statement to return the result of joining snake_cased_char_list with an empty string '' as the separator using the join() method.

js
({
    test: () => assert(runPython(`
    _Node(_code).find_function('convert_to_snake_case').find_return().is_equivalent('return "".join(snake_cased_char_list)')
    `))
})

--seed--

--seed-contents--

py
def convert_to_snake_case(pascal_or_camel_cased_string):
    # snake_cased_char_list = []
    # for char in pascal_or_camel_cased_string:
    #     if char.isupper():
    #       converted_character = '_' + char.lower()
    #       snake_cased_char_list.append(converted_character)
    #     else:
    #         snake_cased_char_list.append(char)
    # snake_cased_string = ''.join(snake_cased_char_list)
    # clean_snake_cased_string = snake_cased_string.strip('_')

    # return clean_snake_cased_string

    snake_cased_char_list = []
--fcc-editable-region--
    return snake_cased_char_list
--fcc-editable-region--

def main():
    print(convert_to_snake_case('aLongAndComplexString'))

main()